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tropism

1

[ troh-piz-uhm ]

noun

, Biology.
  1. an orientation of an organism to an external stimulus, as light, especially by growth rather than by movement.


-tropism

2
  1. variant of -tropy.

tropism

1

/ trəʊˈpɪstɪk; ˈtrəʊpɪzəm /

noun

  1. the response of an organism, esp a plant, to an external stimulus by growth in a direction determined by the stimulus


-tropism

2

combining form

  1. indicating a tendency to turn or develop in response to a certain stimulus

    phototropism

tropism

/ trōpĭz′əm /

  1. The growth or movement of a living organism or anatomical structure toward or away from an external stimulus, such as light, heat, or gravity.
  2. See also geotropism


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Derived Forms

  • ˌtropisˈmatic, adjective
  • tropistic, adjective
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Other Words From

  • tro·pis·mat·ic [troh-piz-, mat, -ik], adjective
  • tro·pis·tic [troh-, pis, -tik], adjective
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Word History and Origins

Origin of tropism1

First recorded in 1895–1900; independent use of -tropism

Origin of tropism2

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Word History and Origins

Origin of tropism1

from Greek tropos a turn

Origin of tropism2

from Greek tropos a turn
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Example Sentences

In those two books, the existential shows itself gradually—breast cancer in the first, a physiological tropism in the second.

Still, Cuccinelli has shown his own tropism toward the kindness of strangers.

This may be a tropism (stereotropism) or it may be a mere surface tension phenomenon.

It's the same old disregard, or it's the same old psycho-tropism, or process of assimilation.

We shall in the succeeding series of papers deal with the subject of tropism in general.

The workers, on the other hand, who have to be in and out of the nest about their business, do not have this tropism.

Nevertheless this is the psycho-tropism of science to all "thunderstones" said to have fallen luminously.

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